Breathing light control circuit and electronic equipment

Abstract

The utility model discloses a breathing light control circuit and electronic equipment; the breathing light control circuit includes: a main control chip U1, a power supply end, a first resistor R1, a second resistor R2, a capacitor C1 and an LED lamp; the output end of the main control chip U1 is connected to the positive electrode of the LED lamp via the first resistor R1, for outputting a PWM control signal; the power supply end is connected to the positive electrode of the LED lamp via the second resistor R2, for powering the LED lamp; the power supply end is also grounded via the capacitor C1; the negative electrode of the LED lamp is grounded. The breathing light control circuit and electronic equipment provided by the utility model are not only simple in structure and low in power consumption, but also low in cost and economical and applicable.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, in particular to a breathing light control circuit and electronic equipment. Background Art

[0002] Breathing light components are used in electronic devices. They rely on the brightness of the built-in LED (Light Emitting Diode) to gradually change from bright to dark under the control of the SOC control chip, just like breathing. By modulating the PWM control signal at different frequencies and duty cycles, they can provide rich visual cues for electronic devices and also have a visual decorative effect. They have been widely used in various fields such as home appliances, mobile phones, computers, and automobiles.

[0003] Existing breathing light control circuits are often complex in structure, consume large power, and have high production costs, resulting in poor economic adaptability. Utility Model Content

[0004] The utility model provides a breathing light control circuit and electronic equipment.

[0005] The first aspect of the utility model provides a breathing light control circuit, the breathing light control circuit comprising: a main control chip U1, a power supply end, a first resistor R1, a second resistor R2, a capacitor C1 and an LED lamp;

[0006] The output end of the main control chip U1 is connected to the positive electrode of the LED lamp via the first resistor R1, and is used to output a PWM control signal;

[0007] The power supply end is connected to the positive electrode of the LED lamp via the second resistor R2, so as to supply power to the LED lamp;

[0008] The power supply end is also grounded via the capacitor C1;

[0009] The negative pole of the LED lamp is grounded.

[0010] Optionally, in a first implementation of the first aspect of the utility model, the power supply end includes an output power supply voltage of 3.3V or 5V.

[0011] Optionally, in a second implementation of the first aspect of the utility model, the LED lamp emits light according to the PWM control signal sent by the main control chip U1.

[0012] Optionally, in a third implementation of the first aspect of the utility model, the capacitor C1 is a filter capacitor, which is used to filter out noise interference in the circuit to avoid false triggering of the LED lamp.

[0013] Optionally, in a fourth implementation of the first aspect of the utility model, the main control chip U1 modulates the frequency and duty cycle of the PWM control signal.

[0014] Optionally, in a fifth implementation of the first aspect of the utility model, the main control chip U1 adopts a high-performance and low-power SOC control chip.

[0015] Optionally, in a sixth implementation of the first aspect of the utility model, the specific model of the main control chip U1 is ESP32.

[0016] The second aspect of the utility model provides an electronic device, which is equipped with the above-mentioned breathing light control circuit. The electronic device also includes: a breathing light component and a power module; the breathing light control circuit, the breathing light component and the power module are all electrically connected;

[0017] Optionally, in a first implementation of the second aspect of the utility model, the power module is specifically used to: supply power to the breathing light control circuit and the breathing light assembly;

[0018] Optionally, in a second implementation of the second aspect of the utility model, the breathing light control circuit is specifically used to control the lighting operation of the breathing light assembly.

[0019] Beneficial effects: The breathing light control circuit and electronic equipment provided by the utility model not only have simple structure and low power consumption, but also have low cost and good economic applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the breathing light control circuit in the embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of an electronic device in an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the frequency modulation of the PWM control signal in the embodiment of the utility model;

[0023] Figure 4 Schematic diagram of duty cycle modulation of PWM control signal in an embodiment of the utility model. DETAILED DESCRIPTION

[0024] The embodiment of the utility model provides a breathing light control circuit and electronic device. In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described through the implementation method with reference to the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] For ease of understanding, the following describes the embodiments of the present invention. Figure 1 , one embodiment of the breathing light control circuit in the utility model embodiment includes: a main control chip U1, a power supply end, a first resistor R1, a second resistor R2, a capacitor C1 and an LED lamp;

[0026] The output end of the main control chip U1 is connected to the positive electrode of the LED lamp via the first resistor R1, and is used to output a PWM control signal;

[0027] The power supply end is connected to the positive electrode of the LED lamp via the second resistor R2, so as to supply power to the LED lamp;

[0028] The power supply end is also grounded via the capacitor C1;

[0029] The negative pole of the LED lamp is grounded.

[0030] Specifically, the power supply terminal includes a power supply voltage outputting 3.3V or 5V.

[0031] Specifically, the LED lamp emits light according to the PWM control signal sent by the main control chip U1.

[0032] Specifically, the capacitor C1 is a filter capacitor, which is used to filter out noise interference in the circuit to avoid false triggering of the LED lamp.

[0033] Specifically, the main control chip U1 modulates the frequency and duty cycle of the PWM control signal.

[0034] Specifically, the main control chip U1 adopts a high-performance and low-power SOC control chip.

[0035] Specifically, the specific model of the main control chip U1 is ESP32.

[0036] More specifically, the circuit of this embodiment is intended to adjust the brightness of the LED light through a PWM (pulse width modulation) signal to achieve a gradual lighting effect similar to breathing. The circuit is mainly composed of the following key components and operates according to the above working principle:

[0037] Main control chip U1: A high-performance, low-power SOC (System on Chip) chip is selected as the control center, such as ESP32, which has a built-in PWM controller and can accurately output control signals.

[0038] The circuit uses 3.3V as the standard power supply voltage to ensure compatibility with the I / O voltage of most SOC chips. The power supply is connected to the positive pole of the LED lamp through a second resistor R2 (for example, 1kΩ) to provide a constant current to ensure that the LED lamp can maintain basic brightness even when there is no PWM signal.

[0039] The first resistor R1 (for example, 470Ω) connects the PWM output pin of the SOC main control chip and the positive electrode of the LED lamp to limit the current and protect the SOC chip, while ensuring the pure transmission of the PWM signal.

[0040] The filter capacitor C1 (for example, 10uF) is connected in parallel between the positive pole of the LED lamp and the ground to effectively filter the power supply noise, ensure the clarity of the PWM signal, and avoid malfunction of the LED due to noise.

[0041] Circuit assembly steps:

[0042] a. Fix the main control chip U1 on the circuit board and ensure that its power and ground wires are correctly connected to the 3.3V power supply and GND.

[0043] b. Connect one end of the second resistor R2 to the 3.3V power line and the other end to the positive terminal of the LED lamp to provide a baseline voltage for the LED lamp.

[0044] c. Connect one end of the first resistor R1 to the designated PWM output pin of the SOC main control chip, and the other end to the positive electrode of the LED lamp to form a PWM signal transmission path.

[0045] d. Install filter capacitor C1 between the positive terminal of the LED lamp and the ground wire, paying attention to the positive and negative polarity of the capacitor.

[0046] e. Finally, connect the negative terminal of the LED light to GND to complete the assembly of the entire circuit.

[0047] Use the development environment and programming language of the SOC main control chip (such as Arduino IDE or ESP-IDF) to write a control program, set the frequency of the PWM output (for example, change from 1Hz to 2Hz) and the duty cycle (cycle from 0% to 100%) to achieve a smooth gradual change of the breathing light effect.

[0048] In the embodiment of the utility model, the beneficial effect is that the breathing light control circuit provided by the embodiment of the utility model has not only a simple structure and low power consumption, but also low cost and good economic applicability.

[0049] The breathing light control circuit in the embodiment of the utility model is described above. The electronic device in the embodiment of the utility model is described below. Figure 2 , an electronic device in an embodiment of the utility model comprises: equipped with the above-mentioned breathing light control circuit, the electronic device also comprises: a breathing light component and a power module;

[0050] The breathing light control circuit, the breathing light assembly and the power module are all electrically connected;

[0051] The power module supplies power to the breathing light control circuit and the breathing light assembly;

[0052] The breathing light control circuit controls the breathing light component to emit light.

[0053] More specifically, the working principle of the breathing light control circuit of this embodiment is as follows: the 3.3V / 5V power supply terminal supplies stable power to the LED light through the second resistor R2, so that the LED light can emit light; the main control chip U1 of the SOC sends a PWM control signal, which is transmitted to the LED light through the first resistor R1. After the LED light receives the PWM control signal, it flashes regularly according to the frequency and duty cycle of the PWM control signal. By controlling the frequency and duty cycle of PWM, the effects of breathing lights of different speeds can be achieved, such as Figure 3 As shown in FIG. 1 , by controlling the PWM frequency to decrease, the flashing of the LED light becomes slower; Figure 4 As shown, by reducing the duty cycle of PWM, the luminous intensity of the LED lamp becomes weaker, and vice versa.

[0054] The utility model adopts the SOC main control chip, which integrates multiple functions on the same chip, significantly reducing the number of external components, which is conducive to the miniaturization design of the product, reducing manufacturing costs and improving production efficiency. The SOC chip can flexibly adjust the brightness change mode, speed, color and other characteristics of the breathing light through software programming to meet the personalized needs of users and easily realize diversified application scenarios. The SOC platform has good scalability, which is convenient for adding subsequent functions or optimizing existing functions, and supports continuous improvement of product performance through software updates, thereby extending the product life cycle.

[0055] In the embodiment of the utility model, the beneficial effect is that the SOC integrates multiple functional modules such as CPU, memory, and peripheral interface, can provide powerful data processing capabilities and efficient energy management, and supports complex algorithm implementation, which is very suitable for the development of highly integrated, low-power, and intelligent electronic devices. The electronic device provided by the embodiment of the utility model is not only simple in structure and low in power consumption, but also low in cost and economical and applicable.

[0056] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0057] In the description of the present utility model, unless otherwise clearly defined, words such as "setting" should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above words in the present utility model based on the specific content of the technical solution.

[0058] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A breathing light control circuit, characterized in that: The breathing light control circuit includes: a main control chip U1, a power supply end, a first resistor R1, a second resistor R2, a capacitor C1 and an LED light; The output end of the main control chip U1 is connected to the positive electrode of the LED lamp via the first resistor R1, and is used to output a PWM control signal; The power supply end is connected to the positive electrode of the LED lamp via the second resistor R2, so as to supply power to the LED lamp; The power supply end is also grounded via the capacitor C1; The negative pole of the LED lamp is grounded.

2. The breathing light control circuit according to claim 1, characterized in that: The power supply terminal outputs a supply voltage of 3.3V or 5V.

3. The breathing light control circuit according to claim 2, characterized in that: The LED lamp emits light according to the PWM control signal sent by the main control chip U1.

4. The breathing light control circuit according to claim 3, characterized in that: The capacitor C1 is a filter capacitor, which is used to filter out noise interference in the circuit to avoid false triggering of the LED lamp.

5. The breathing light control circuit according to claim 4, characterized in that: The main control chip U1 modulates the frequency and duty cycle of the PWM control signal.

6. The breathing light control circuit according to claim 5, characterized in that: The main control chip U1 adopts a high-performance and low-power SOC control chip.

7. The breathing light control circuit according to claim 6, characterized in that: The specific model of the main control chip U1 is ESP32.

8. An electronic device equipped with the breathing light control circuit according to claims 1-7, characterized in that: The electronic device further comprises: a breathing light component and a power module; The breathing light control circuit, the breathing light assembly and the power module are all electrically connected; The power module supplies power to the breathing light control circuit and the breathing light assembly; The breathing light control circuit controls the breathing light component to emit light.

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